Hydraulic extrusion press with improved supporting frame structure



Nov. 7, 1967 E. MULLER HYDRAULIC EXTRUSION PRESS WITH IMPROVEDSUPPORTING FRAME STRUCTURE 4 Sheets-Sheet 1 Filed Nov. 18, 1964 wvmro/gERA/S T MUL L 5/? r J /MW A ram/s Y:

NOV. 7, 1967 MULLE 3,350,910

. HYDR 1c EXTRUSION PRES I IMPROVED UPPORTING FRAME STRUC RE Filed Nov,18, 19 64 4 Sheets-Sheet 2 V s y INVENTOR} r z-vwsr MOLLEI? ATTORA/EYJ'.

7,1967 E. MULLER 3,350,910

HYDRAULIC EXTRUSION PRESS WITH IMPROVED SUPPORTING FRAME STRUCTURE FiledNov. 18, 1964 4 Sheets-Sheetti E. MULLER RUS Nov. 7, 1967 HYDRAULIC EXTION PRESS WITH IMPROVED SUPPORTING FRAME STRUCTURE 4 Sheets-Sheet 4Filed NOV. 18, 1964 INVE/VTOR .m/sr Mam-2 rron/ms.

United States Patent M 3,350,910 HYDRAULIC EXTRUSION PRESS WITH IM-PROVED SUPPORTING FRAME STRUCTURE Ernst Miilier, Duisburg, Germany,assignor to Hydraulik G.m.b.H., Duisburg, Germany Filed Nov. 18, 1964,Ser. No. 412,068 11 Claims. (Cl. 72-453) ABSTRACT OF THE DISCLOSURE Ahydraulic extrusion press is disclosed which includes an improved framestructure composed of side plate elements or assemblies which include aplurality of plate members with a common longitudinally elongatedopening. The side frame members are held together by cross frame membersto form a box-like structure and the press parts are separatelysupported within the box-like structure on a foundation. A feature ofthe invention is that the press parts bear in outward oppositedirections against the side frames, and for this purpose a cross headwith the movable part has an extension which bears laterally through theopening against the end wall bounding the opening of the side frame. Areceiver of the press has an adapter extension which extends outwardlyfrom each side and bears through the openings of the side frames in anopposite direction against the opposite ends of the openings of theframe members.

A further feature of the invention resides in the separate support ofthe press elements on guideways which are supported directly on afoundation and provide for sliding movement of the movable part of thepress. In addition, the cross frame members of the press supportingstructure are such that they are provided with recesses so that they mayengage over projections defined on the side frame members to provide astructure which is rigid but permits relative expansion of the parts.The side frame members are advantageously made of a laminar of aplurality of individual plates to form a very strong structure whichprovides ample support for the movement of the press parts. The pressparts during operation will place the side frame members substantiallyonly in traction.

By providing plate frames which are stressed substan tially only undertension and which include window-like recesses or openings, theconstruction costs are extremely low and the lateral accessibility ofthe parts is insured to a great extent. The laminar structure of theside frames provides rigid side supporting structures which insure thatthe center axis of the stationary and moving cross beams of the pressare maintained in alignment.

Summary of the invention This invention relates in general to theconstruction of extrusion presses and, in particular, to a new anduseful hydraulic metal extrusion press construction with longitudinalside girders made up of a plurality of individual plate elements havinga central cut out area for the accessibility of the parts and beingsupported separately from the movable parts of the press.

Prior to the present invention, extrusion presses or tube presses havebeen known as column or frame presses. The column or frames are sodimensioned that they are capable of absorbing the entire pressure forceexerted between the two cross beams which act as a tensile force. Boththe column type and the frame type construction have a disadvantage inthat they are very heavy. The columns must be machined and are providedat both ends with threads for the tightening nuts. The securing of theseheavy tension columns requires very heavy lugs. The

8 3,3503% Patented Nov. 7, 1967 column construction is not completelyresistant to bending in axial directions, so that a special rigidsupporting construction is usually required for the guideways, which isindependent of the columns and on which the moving cross head and thereceiver are displaceable. This results in additional weight. This typeof construction is very expensive because of the great weight and highmachining costs. When a frame construction is employed, it is also veryexpensive because of the extremely great weight of the press frame andis therefore only used in extrusion presses up to certain sizes. In theknown hydraulic extrusion and tube presses, the cross beams are combinedwith the foot guiding longitudinal frame connecting them, to form abox-like construction. The longitudinal frames are arranged laterally ofthe vertical longitudinal plane of the press and symmetrically inrespect thereto at a distance from the bottom or ground to provide awide wall girder with a vertical main plane. Wide walled girders have ahigh resistance moment and are therefore practically resistant tobending, but such constructions are costly and result in relativelygreat overall weight. A further disadvantage is that they do not providea free lateral access to the parts and to the necessary auxiliarydevices provided, for example, for the introduction of blocks, theexchange of dies and the separation of the extrusion.

In accordance with the present invention, there is provided aconstruction which is both inexpensive and practical, and provides aframe which permits ready access for the various accessory devices. Inaccordance with the invention, there are provided side frame elementswhich are formed of a plurality of sheet metal plates which are cut awaycentrally to define windows or access areas of a sufficient length suchthat the cross beams forming the overall frame may rest at each endpreferably on protruding lugs carried on the side frames which projectinto recesses defined on the cross beams. The side frames are supportedseparately from additional guiding means for the moving parts of thepress. Byproviding the plate frames, which are merely stressed fortension with window-like recesses, the construction costs are extremelylow and the lateral accessibility of the press is insured to a greatextent.

In accordance with the inventive principles, for example, in sheetbending and heating plate presses and certain types of drop forgepresses, the press frame can be made of a plurality of sheet metalelements or packs. Although the frames formed of a plurality of thinsheet metal elements are not resistant to bending in the transverseplane, this is not a disadvantage because an exact guidance of themoving parts is not so import-ant as a rule. However, in extrusionpresses, and particularly presses for tools, which are equipped with apress mandrel, it is absolutely essential that the center axis of thestationary and moving cross beams of the press 'be maintained. Thisshould be insured even under the action of heat in the range of thecross beams, and this may be accomplished with the construction of thepresent invention.

According to the invention, considerable savings in weight and costs areachieved by making the press frame of the two frame parts formed ofsheet metal packs which are arranged at both sides of the cross beams.The invention makes use of the discovery that sheet metal packs of thetype referred to, when stressed for tension offers with the same crosssection more security against tearing than does a solid girder. Anydisadvantage of the side frame in respect to resistance against bendingstresses in the transverse planes is eliminated by the fact that theguideway for the axially moving parts, such as the receiver and themoving cross head of the press, is kept free from any adverse effects byan arrangement in which these parts are separately supported directly onthe foundation.

According to one feature of the invention, the stationary cross beamsare held with respect to the press frames, which are made of a pluralityof individual plate elements, by means of adaptors arranged at bothsides of the cross frames which engage in corresponding grooves definedin the side beams. This provides means for making certain that the diesupport will not be displaced even during heating of the cross beams.

According to another important embodiment of the invention, the sideframes which are made of a plurality of plate elements, are spaced apartfrom the cross frames by means of spacer elements and screws to allowfor any expansion due to heating. This arrangement is particularlysuitable for presses for widening heated metal blocks. In such cases,there is a possibility that inaccuracies will occur in both axialdirections, due to the heat expansion of the counter beam. With theinventive construction, the counter beam can thus expand in eachdirection without its center axis being displaced.

Accordingly, it is an object of this invention to provide an improvedhydraulic press construction.

A further object of the invention is to provide an extrusion presshaving side frames which are made up of a plurality of plate elementswith cut out central areas providing easy access to the moving andstationary extrusion parts and with means for independently supportingthe frame elements and for guiding the moving parts of the pressseparately on the ground or a foundation.

A further object of the invention is to provide an extrusion press withside frame elements, comprising a plurality of plate members which aresecured together and which are connected with cross beam members bymeans of a sliding groove and recess connection which permitslongitudinal movement, and with spacers interposed between thelongitudinal frame elements and the cross frame elements permittingmovement in transverse planes between the various parts.

A further object of the invention is to provide an extrusion pressconstruction which is simple in design, rugged in construction andeconomical to manufacture.

The various features of novelty which characterize the invention arepointed out with particularity in the claims annexed to and forming apart of this specification. For a better understanding of the invention,its operating advantages and specific objects attained by its use,reference should be had to the accompanying drawings and descriptivematter in which there are illustrated and described preferredembodiments of the invention.

In the drawings:

FIG. 1 is a side elevational view of a metal extrusion press constructedin accordance with the invention;

FIG. 2 is a section taken on the line 2, 2 of FIG. 1;

FIG. 3 is a section taken on the line 3, 3 of FIG. 1;

FIG. 4 is a section similar to FIG. 3, but indicating the portion in thearea designated X of FIG. 3 in an enlarged detailed view;

FIG. 5 is a view similar to FIG. 1 of another embodiment of theinvention;

FIG. 6 is a section taken on the line 6, 6 of FIG. 5;

FIG. 7 is a section taken on the line 7, 7 of FIG. 5; and

FIG. 8 is an enlarged detail of a portion of the section indicated inFIG. 7 by the location Y.

Referring to the drawings and in particular to the embodiment indicatedin FIGS. 1-4, the invention embodied therein comprises an extrusionpress which, in accordance with the invention, is provided withlongitudinal or side frame members generally designated 1 which are madeup of a plurality of individual sheet metal elements or packs which inthe embodiment illustrated comprises two plates 1a and 1b (FIG. 4). Theplates 1a and 1b are held together or braced by means of screw jointelements or bolts 4 which are arranged on both sides of stationary crossbeams which include a cylinder beam 2 (FIG. 1) and a counter beam 3(FIG. 3).

The frame plates and packs generally designated 1 are provided withopenings or cut out portions located substantially centrally andelongated in a longitudinal direction. The stationary cross beam 2includes a laterally projecting lug portion 2a and the cross beam 3includes a laterally projecting lug portion 3a which extend outwardlythrough the openings defined in each of the side plate frames 1. In theembodiment illustrated, the opening is formed with reduced endsterminating in vertical edges 1d, 1:! against which the lug areas 2a and3a, respectively, abut.

In accordance with a feature of the invention the longitudinal plates 1and the cross members or cross beams 2 and 3 interengage by means of aprojecting lug and recess formation which in the embodiment illustratedcomprises elements forming an adapter or projecting lug 5 and 6 on theframe 1 which is adapted to ride in a recess or groove which is definedalong the longitudinal length of the cross beam members 2 and 3.

The side frame elements 1 are supported at each end by means of brackets8 which are carried on transverse foundation frame elements 9a and 9b,respectively, the latter being in a recess defined in a base formation10. In one arrangement the bracket 8 on the support 9a is ecured againstboth longitudinal and transverse movement by a key member or holding lug16 and by end portions of the frame 911, respectively. At the oppositeend the bracket 8 is held against transverse movement but is free tomove longitudinally.

In FIG. 2 it is seen how the piston rod 17 for relative sliding movementof the parts is mounted on the top and bottom ends of the receiver 13.The receiver carries a separating device 18 for separating the extrusionas well as a device 19 for exchanging the dies.

In accordance with a further feature of the invention longitudinallyextending beams 11 are mounted in the foundation recess and supportguide ways 12 which form divergently outwardly sloping surfaces uponwhich similarly formed surfaces 15 of the receiver 13 and crosshead 14are slidable. The construction provides a separate and independentsupport for the sliding movement of the receiver 13 as well as the crosshead 14 of the mandrel of the press without in any way interfering withthe support for the side frames 1. The construction permits unhinderedoperation of the moving press parts without being affected by anyexpansion or contraction of the side plate elements by changes intemperature. By providing for the longitudinal movement of the frameparticularly on the end having the receiver 13 which is subjected tounavoidable heating an unhindered longitudinal expansion may take place.

A further important inventive feature of the construction is that thelongitudinal side frames are joined together by the cross beams 2 and 3in order to form a boxlike construction. Each side frame is providedwith the longitudinally extending window or cutout and they areadvantageously made up of a plurality of separate plate openingsterminating on each end with the substantially straight or vertical wall1d which bears against an operative part of the press such as theadapter 2a of the movable cross head part at one end and the adapter 3aof the receiver at the opposite end. The cross head parts are separatelysupported in the foundation so that when pressure is applied to operatethe press, the force of the movable cross head acting on the workpiecewill be distributed outwardly to the side frame members through thewalls 1d, 1d. This results in a pure traction force acting on all of thesheet *metal plates of the side frames 1.

In the preferred construction, several plates make up each side frame inthe form of a plate laminar structure so that the traction forces willbe transmitted individually in a closed system to the supporting sideframes.

In addition because the movable parts and the frame are supportedseparately there will be no transposition.

of the parts due to any variations in the position of the frameincluding the intermediate portions 10, 1c.

In the embodiment illustrated in FIGS. 5-8, similar parts are similarlydesignated but are referred to with a prime indication thereafter. Inthis embodiment, instead of using separate frames 9a and 911 forsupporting the plates 1', a single longitudinally elongated girder 9c ismounted in the foundation recess of the foundation 10. Brackets 8 and 8aare provided at the respective ends of the press frame 1. The bracket 8'compares to the bracket 8 in the other embodiment, whereas the bracket8a includes an elevated bearing block portion 9d which extends up to thelevel of the center of the press axis and is arranged on the board sideof each of the plates 1 to support the press frame. This insures thepermanent maintenance of the center of the die even if the counter beam3' expands under the action of heat.

In FIG. 8 spacers 20 are provided for insuring a spacing between thecounter beam or cross beam 3' and the plate assembly 1. This permitsexpansion of the counter beam 3 in a transverse direction.

On the base frame 9c is also supported a supporting construction 11 forguide ways 12 which support the receiving part or moving cross beamelement 13 and moving element 14' independently of the frames 1', 1 andinsure the exact alignment of these elements.

Thus the design according to the invention insures, independent of anyheating of the counter beam and the resultant expansion in longitudinaldirections as well as transverse directions, a permanent alignment ofthe center axes of the die holders and the moving press parts. Thismakes it possible to use in an extrusion press, a press frame formed ofsheet metal packs without the usual disadvantages of a low lateralstability of such a frame. Due to the elimination of the heavy tensioncolumns and the better design of the stationary cross beams, the Weightof such a press can be considerably reduced. Instead of the big lugs forthe columns, only small laterally protruding lugs are provided on thestationary cross beams by means of which the cylinder and the counterbeam bear against the end faces of the frames on both sides. In thismanner, merely tensile forces are transmitted to the frame base.

While specific embodiment of the invention have been shown and describedin detail to illustrate the application of the inventive principles, itwill be understood that the invention may be embodied otherwise withoutdeparting from such principles.

What is claimed is:

1. A hydraulic extrusion press comprising first and second laterallyspaced longitudinal-1y elongated side frame members, each of said sideframe members comprising a plurality of plate members, means forsecuring said plate members together, said frame members having anopenin-g defined in the vicinity of the central portion thereof, aplurality of cross members extending between said side frame members,said side frame members having projecting adapters which project intocorresponding recesses formed on said cross plate members for supportingsaid cross plate members in a manner permitting movement thereof, afoundation, bracket means for mounting said side plate members on saidfoundation, said press including a receiver and a moving cross headcarried by said cross members, and guide means mounted on saidfoundation independently of said bracket means for separately guidingsaid extrusion press receiver and said moving cross head for relativemovement thereof.

2. A hydraulic extrusion press comprising first and second laterallyspaced longitudinally elongated side frame members, each frame membercomprising a plurality of plate members, means for securing said platemembers together, said frame members having an opening defined in thevicinity of the central portion thereof, a plurality of cross membersextending between said side frame members, said side frame membershaving projecting adapters which project into corresponding recessesformed on said cross members for supporting said cross members in amanner permitting movement thereof, a foundation, bracket means formounting said side frame members on said foundation, said pressincluding a receiver carried by at least one of said cross members and amoving cross head carried by another of said cross members, and guidemeans mounted on said foundation independently of said bracket means forseparately guiding said extrusion press receiver and said moving crosshead for relative movement thereof, said receiver and said moving crosshead each including lateral projections which extend through the openingof said cross frame.

3. A hydraulic extrusion press comprising first and second laterallyspaced longitudinally elongated side frame members, each frame membercomprising a plurality of plate members, means for securing said platemembers together, said frame members having an opening defined in thevicinity of the central portion thereof, a plurality of cross membersextending between said side frame members, said side frame membershaving projecting adapters which project into corresponding recessesformed on said cross plate members for supporting said cross platemembers in a manner permitting movement thereof, a foundation, bracketmeans for mounting said side frame members on said foundation, saidpress including a receiver carried by at least one of said cross membersand a moving cross head carried by another of said cross members, andguide means mounted on said foundation independently of said bracketmeans for separately guiding said extrusion press receiver and saidmoving cross head for relative move: ment thereof, said bracket meansincluding a first bracket connected to one end of each of said sideframe members and a second bracket connected to the opposite end of eachof said side frame members, at least one of said first and secondbrackets being connected in a manner permitting longitudinal movement ofsaid plates.

4. A hydraulic extrusion press comprising first andsecond laterallyspaced longitudinally elongated frame members, each frame membercomprising an plurality of plate members, means for securing said platemembers together, said frame members having an opening; defined in thevicinity of the central portion thereof, a plurality of cross membersextending between said side frame members, said side frame membershaving projecting adapters which project into corresponding recessesformed on said cross plate members for supporting said cross platemembers in a manner permitting movement thereof, a foundation, bracketmeans for mounting said side frame members on said foundation, saidpress including a receiver carried by at least one of said cross membersand a moving cross head carried by another of said cross members, andguide means mounted on said foundation independently of said bracketmeans for separately guiding said extrusion press receiver and saidmoving cross head for relative movement thereof, said bracket meansincluding a first bracket connected to one end of each of said'sideframe members and a second bracket connected to the opposite end of eachof said side frame members, at least one of said first and secondbrackets being connected in a manner permitting longitudinal movement ofsaid side frame members, at least one of said first and second bracketsalso being of a height extending upwardly in contact with the associatedside frame members to at least the level of the axis of said extrusionpress.

5. A hydraulic extrusion press comprising first and second laterallyspaced longitudinally elongated frame members, each frame membercomprising a plurality of plate members, means for securing said platemembers together, said frame members having an opening defined in thevicinity of the central portion thereof, a plurality of cross membersextending between said side frame members, said side frame membershaving projecting adapters which project into corresponding recessesformed on said cross plate members for supporting said cross members ina manner permitting movement thereof, a foundation, bracket means formounting said side plates on said foundation, said press including areceiver carried by at least one of said cross members and a movingcross head carried by another of said cross members, guide means mountedon said foundation independently of said bracket means for separatelyguiding said extrusion press receiver and said moving cross head forrelative movement thereof, said side frame members having an adaptercomprising elements secured thereto and forming a projecting lug, saidcross members having a longitudinally extending recess defined thereinfor receiving the projecting lug for permitting sliding movement of saidcross plate and said side plates in respect to each other, and means forspacing said cross plate and said side frame members to permittransverse movement of one in respect to the other.

6. A hydraulic extrusion press comprising first and second laterallyspaced longitudinally elongated frame members, each frame membercomprising a plurality of plate members, means for securing said platemembers together, said frame members having an opening defined in thevicinity of the central portion thereof, a plurality of cross membersextending between said side plates, said side plates having projectingadapters which project into corresponding recesses formed on said crossplate members for supporting said cross plate members in a mannerpermitting movement thereof, a foundation, bracket means for mountingsaid side plates on said foundation, said press including a receivercarried by at least one of said cross members and a moving cross headcarried by another of said cross members, and guide means mounted onsaid foundation independently of said bracket means for separatelyguiding said extrusion press receiver and said moving cross head forrelative movement thereof, wherein said bracket means are supported onthe foundation by a common base frame, said guide ways being mounted onsaid base frame.

7. A hydraulic extrusion press comprising first and second laterallyspaced longitudinally elongated frame members, each frame membercomprising a plurality of plate members, means for securing said platemembers together, said frame members having an opening defined in thevicinity of the central portion thereof, a plurality of cross membersextending between said side plates, said side plates having projectingadapters which project into corresponding recesses formed on said crossplate members for supporting said cross plate members in a mannerpermitting movement thereof, a foundation, bracket means for mountingsaid side plates on said foundation, said press including a receivercarried by at least one of said cross members and a moving cross headcarried by another of said cross members, and guide means mounted onsaid foundation independently of said bracket means for separatelyguiding said extrusion press receiver and said moving cross head forrelative movement thereof, said guide ways having guide faces formed byoblique surfaces extending outwardly from each side.

8. An extrusion press construction comprising a pair of spacedsubstantially parallel longitudinal side frames each having alongitudinally elongated opening, means mounting said side frames inspaced relationship to form a box-like structure; and press partsbetween said side frames including: a press receiver adjacent one end ofsaid spaced side frames leaving an adapter portion bearing outwardlyagainst the ends of the openings of said side frames and a cross headhaving an adapter portion bearing against the opposite ends of theopenings of said side frames and a movable portion movable toward saidreceiver portion, said receiver and said cross head bearing in oppositeoutward directions against said side frames to place said side framessubstantially in traction during operation of said press.

9. An extrusion press construction comprising a pair of spacedsubstantially parallel longitudinal side frames each having alongitudinally elongated opening and each comprising a plurality ofseparate plate elements, means mounting said side frames in spacedrelationship including a plurality of cross beam elements disposedbetween said side frames and forming a box-like structure therewith,press parts between said side frames including: a press receiveradjacent one end of said side frames having an adapter portion bearingoutwardly against said side frames adjacent the one end of the openingsthereof and a moving cross head having an adapter portion bearingoutwardly against the side frames adjacent the opposite ends of theopenings thereof; and means for holding said cross beam elements to saidside frames including a laterally protruding lug formation on oneengageable in the longitudinally extending recess defined on the otherof said cross beam elements and said side frames.

10. An extrusion press construction comprising a pair of spacedsubstantially parallel longitudinal side frames each having alongitudinally elongated opening and each comprising a plurality ofseparate plate elements, spaced baskets mounting said side frames inspaced relationship permitting longitudinal expansive movement of saidside frames, press parts between said side frames including a pressreceiver adjacent one end of said side frames including an adapterportion bearing outwardly against said side frames adjacent the one endof the openings thereof and a moving cross head having an adapterportion bearing outwardly against the side frames adjacent the oppositeends of the openings thereof, and means for holding said cross beamelements to said side frames including a laterally protruding lugformation on one engageable in the longitudinally extending recessdefined on the other of said cross beam elements and said side frames.

11. An extrusion press construction comprising a pair of spacedsubstantially parallel longitudinal side frames each having alongitudinally elongated opening and each comprising a plurality ofseparate plate elements, means mounting said side frames in spacedrelationship, press parts between said side frames including a pressreceiver adjacent one end of said side frames including an adapterportion bearing outwardly against said side frames adjacent the one endof the openings thereof and a moving cross head having an adapterportion bearing outwardly against the side frames adjacent the oppositeends of the openings thereof, and means forming longitudinally extendingguides for said press parts for supporting said press partsindependently of said side frames.

References Cited UNITED STATES PATENTS 1/1934 Lingren -s 83--701 7/ 1958Munschauer 52690

1. A HYDRAULIC EXTRUSION PRESS COMPRISING FIRST AND SECOND LATERALLYSPACED LONGITUDINALLY ELONGATED SIDE FRAME MEMBERS, EACH OF SAID SIDEFRAME MEMBERS COMPRISING A PLURALITY OF PLATE MEMBERS, MEANS FORSECURING SAID PLATE MEMBERS TOGETHER, SAID FRAME MEMBERS HAVING ANOPENING DEFINED IN THE VICINITY OF THE CENTRAL PORTION THEREOF, APLURALITY OF CROSS MEMBERS EXTENDING BETWEEN SAID SIDE FRAME MEMBERS,SAID SIDE FRAME MEMBERS HAVING PROJECTING ADAPTERS WHICH PROJECT INTOCORRESPONDING RECESSES FORMED ON SAID CROSS PLATE MEMBERS FOR SUPPORTINGSAID CROSS PLATE MEMBERS IN A MANNER PERMITTING MOVEMENT THEREOF, AFOUNDATION, BRACKET MEANS FOR MOUNTING SAID SIDE PLATE MEMBERS ON SAIDFOUNDATION, SAID PRESS INCLUDING A RECEIVER AND A MOVING CROSS HEADCARRIED BY SAID CROSS MEMBERS, AND GUIDE MEANS MOUNTED ON SAIDFOUNDATION INDEPENDENTLY OF SAID BRACKET MEANS FOR SEPARATELY GUIDINGSAID EXTRUSION PRESS RECEIVER AND SAID MOVING CROSS HEAD FOR RELATIVEMOVEMENT THEREOF.